package ink.lovejinhu.base.pdd;

import java.util.Scanner;

/**
 * @author jinhu
 * created 2021-06-30 10:33
 */
public class Pdd_2021_01 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int i = scanner.nextInt();
        if (i >= 18) {   //数位之和不会大于18
            System.out.println(-1);
        }


    }

    public int[] findZuhe(int target) {
        return null;
    }

}
